The Low Excitation Lines in Quasars and AGN in the Frame Work of Photoionization Models

  • S. Collin-Souffrin
Part of the Astrophysics and Space Science Library book series (ASSL, volume 121)


Up to now, the photoionization models, which account well for the intensities of high excitation lines (CIV, CIII, Lα…) in quasars and AGN, are less successful in explaining the low excitation lines (FeII, MgII, Balmer lines…). In this paper is described a work in which a large number of situations, especially suited for low excitation line emission, are explored, in the framework of photoionization models.


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Copyright information

© Springer Science+Business Media Dordrecht 1986

Authors and Affiliations

  • S. Collin-Souffrin
    • 1
  1. 1.Observatoire de Paris-MeudonMeudon Principal CedexFrance

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